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EVA (Ethylene-Vinyl Acetate) film

A kind of adhesive film, the same technology, applied in the direction of adhesive, film/sheet adhesive, film/sheet without carrier, etc., can solve the problems of reduced production speed, reduced production efficiency, low shrinkage rate, etc., to ensure production Effects of speed, productivity improvement, and low shrinkage

Pending Publication Date: 2018-03-09
浙江利昌科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the following methods are generally used to reduce the shrinkage rate of EVA film: (1) adopt the segmental traction method, that is, reduce the shrinkage rate by segmental traction to the EVA film, but the method is cumbersome and the effect is not significant; ( 2) Reduce the production speed and ensure the lower shrinkage rate of the EVA film through low-speed traction, but it will greatly reduce the production efficiency; (3) Add a "tempering" device during the cooling process of the EVA film, and use the cooling method for the cooled EVA film The process of reheating and recooling reduces shrinkage, but this process will increase energy consumption and affect the stability of production

Method used

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  • EVA (Ethylene-Vinyl Acetate) film
  • EVA (Ethylene-Vinyl Acetate) film

Examples

Experimental program
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Embodiment 1

[0029] The upper and lower surfaces of the EVA film are independently pressed with a mixed pattern with periodic arrangements of square pyramid patterns and frosted patterns; among them, the periodic length of the upper surface pattern is 393mm, the length of the square pyramid pattern is 193mm, and the length of the frosted pattern is 200mm ; The period length of the pattern on the lower surface is 440mm, the length of the square pyramid pattern is 200mm, and the length of the frosted pattern is 240mm.

[0030] figure 1 The sectional view of the overall structure of the EVA adhesive film prepared in Example 1, the marks in the accompanying drawings are described as follows: 1-1 adhesive film layer, 1-2 frosted pattern, 1-3 quadrangular pyramid pattern; figure 2 is the front view of the frosted pattern; image 3 It is the front view of the quadrangular pyramid pattern.

[0031] Production lines No. 1 to No. 3 were used to prepare EVA films under the conditions of production...

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Abstract

The invention provides an EVA (Ethylene-Vinyl Acetate) film. Mixed patterns are independently pressed on the upper surface and the lower surface; and the mixed patterns comprise geometrical patterns and frosted patterns. The EVA film provided by the invention has low shrinkage ratio, and the production speed of the production line can be effectively ensured, so that the production efficiency of the EVA film is greatly improved.

Description

technical field [0001] The invention relates to the technical field of photovoltaic module packaging, in particular to an EVA adhesive film. Background technique [0002] EVA adhesive film is used for photovoltaic module packaging, and shrinkage rate is an important performance indicator. The existing photovoltaic module packaging process is to stack five layers of backplane, EVA film, crystalline silicon cell, EVA film and tempered glass neatly, put them into a laminating machine, vacuumize and heat, and melt through the EVA film Cross-linking occurs, solidifies after cooling, and obtains a photovoltaic module. Among them, if the shrinkage rate of the EVA film is too large, the neatly arranged crystalline silicon cells will be displaced during the process of melting, crosslinking, cooling and solidification, or the welding rods on the crystalline silicon cells will be displaced or twisted, thus affecting the photovoltaic module. Overall performance is adversely affected. ...

Claims

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Application Information

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IPC IPC(8): C09J7/10H01L31/048B29C59/02
CPCH01L31/048C09J7/00B29C59/02C09J2203/326C09J2423/04Y02E10/50
Inventor 詹显光蒋祥吉管嗣光
Owner 浙江利昌科技有限公司
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